U.S. guidelines count heavy gardening as strength training, so give your back a plan

Key takeaways

• The federal Physical Activity Guidelines list heavy gardening among muscle-strengthening activities and rank heavy digging or shoveling as vigorous exercise³.
• In the 2024 Adult Compendium of Physical Activities, weeding with a hoe rates 5.0 METs, shoveling dirt 5.5 and vigorous digging 7.3, while light potting rates just 2.6¹.
• Kansas State University researchers who watched 14 home gardeners aged 63 to 86 found they worked at a moderate 3.8 METs and reported about 15 hours of gardening a week in June and July⁵.
• In a small Seoul study of women in their late 70s, a twice-weekly gardening program improved a step test and hand dexterity, but grip and leg strength didn’t change⁶.
• Penn State Extension advises lifting with your legs, pivoting your feet instead of twisting, and changing position at least every 10 minutes⁹.

Most people picture strength training as dumbbells and gym machines. The federal Physical Activity Guidelines name something else beside them: heavy gardening³.

The same 2018 guidelines rank heavy yard work, digging or shoveling hard enough to raise your heart rate, as vigorous activity³. That puts a hard session of digging in the same class as hiking uphill with a heavy pack³.

Gardeners have long felt this in their backs and shoulders. Researchers have measured it, too, with heart monitors in real gardens and breathing masks in the lab⁵.

For natural-health readers, the garden is an appealing gym. It offers sun, soil, food and work with a purpose, and it asks for no membership fee. This article treats gardening as exercise: which chores count, what studies of gardeners show, how to build a garden workout, and how to keep your back and knees in the game.

Our home vegetable gardening article covers food, money and garden safety. Our community gardens article covers a randomized trial of shared plots and how to test soil.

Your garden chores, ranked by effort

Researchers rate effort in METs, or metabolic equivalents. One MET is the energy you use sitting still. The federal guidelines call 3.0 to under 6.0 METs moderate and 6.0 or more vigorous³.

The 2024 Adult Compendium of Physical Activities, a catalog of the energy cost of 1,114 activities for adults 19 to 59, includes dozens of lawn and garden tasks¹. Here is a selection, grouped by effort.

Effort level	Garden task (2024 Adult Compendium)	METs
Light	Planting, potting or transplanting, light effort	2.6
Moderate	Picking flowers or vegetables	3.0
Moderate	Digging or spading, light to moderate effort	3.5
Moderate	Weeding, light to moderate effort	3.8
Moderate	Watering, standing or walking	4.0
Moderate	Raking leaves, moderate effort	4.0
Moderate	Planting crops, stooping, moderate effort	4.3
Moderate	Weeding, moderate effort	4.5
Moderate	Pushing a wheelbarrow or garden cart	4.8
Moderate	Weeding with a hoe, moderate to vigorous effort	5.0
Moderate	Shoveling dirt or mud	5.5
Moderate	Mowing with a walk-behind mower, moderate effort	5.5
Vigorous	Pushing a heavy wheelbarrow or large cart	6.0
Vigorous	Hauling brush or laying gravel	6.3
Vigorous	Digging, spading or filling the garden, vigorous effort	7.3

The effort label matters most. Light digging rates 3.5 METs, and hard digging rates 7.3¹. The chore’s name tells you less than how hard you push.

If you’ve seen other numbers for older gardeners, including in our home gardening article, this is why. A separate Older Adult Compendium measures effort against a lower resting baseline, because older adults burn less energy at rest². The two lists aren’t directly comparable, so use the one that matches your age.

Can your garden cover your weekly activity?

The federal guidelines call for 150 to 300 minutes of moderate activity a week, or 75 to 150 minutes of vigorous activity³. All amounts of moderate or vigorous activity count, so 20 minutes of steady hoeing counts toward your total just like 20 minutes of brisk walking³.

Kansas State University researchers tested whether real gardeners get there. In the summer of 2006, they followed 14 home gardeners aged 63 to 86 into their own yards, wired them with heart monitors and measured their effort⁵.

On average, the gardeners worked at 3.8 METs, solidly moderate, with heart rates around 98 beats a minute⁵. They reported gardening about 33 hours a week in May and about 15 hours a week in June and July⁵. Their scores on a standard physical health survey beat the average for people their age⁵.

The authors concluded that healthy older gardeners can meet activity recommendations through daily gardening⁵. That’s encouraging, but it was 14 people who already loved gardening. It can’t show whether gardening made them healthy or healthy people kept gardening.

Notice the seasonal drop, too. Their hours fell by more than half from May to midsummer⁵, and most climates bring a winter with no garden at all. Plan an off-season activity.

What about strength? The guidelines count muscle-strengthening work when it takes moderate or greater effort and works the major muscle groups: legs, hips, back, abdomen, chest, shoulders and arms³. Ideally, you work until another repetition would be hard³.

Digging, hauling and lifting bags of soil can meet that bar. Potting and watering usually can’t. HHS is now drafting a 2027 supplement to the guidelines on step counts and muscle-strengthening activity, and it is taking public comments through November 12, 2026⁴.

What a gardening program did for women in their late 70s

Some of the most detailed tests of gardening as exercise come from a Konkuk University team in Seoul. In 2015, they ran a gardening program at one senior center and compared it with women at another center who didn’t garden⁶.

The 24 gardeners, average age 79, met twice a week for about 50 minutes, 15 sessions in all⁶. They planned the garden, planted, weeded, watered, harvested and arranged flowers⁶. Attendance averaged 80%⁶.

The results were mixed in a way worth knowing⁶:

• Improved: Gardeners went from about 79 to 95 steps on a two-minute step test of endurance. Their hand dexterity improved, and their waists shrank by about a centimeter.
• Held steady: Gardeners kept their lean muscle mass and their speed on a get-up-and-walk test. The women who didn’t garden lost a little of both.
• Didn’t change: Grip strength, chair stands and arm curls stayed about the same.
• Mood: Depression scores rose in the non-gardening group but not among gardeners.

A smaller pilot by the same team compared 11 women over 70 who gardened with 10 who didn’t⁷. The gardeners’ top blood pressure number fell from 148 to about 136, and their HDL, the “good” cholesterol, rose⁷. Oddly, their total cholesterol rose, too⁷.

Their hearts worked at about 57% of maximum, a moderate effort, yet they rated the work as very light⁷. That may be gardening’s quiet advantage: real effort that doesn’t feel like a chore.

Keep the limits in view. Neither study assigned people at random, and the comparison women in the larger study were about five years older⁶⁷. The groups were small, the programs lasted about two months, and the larger paper reports some numbers inconsistently⁶. Funding came from university research programs, not from any garden company⁶⁷.

Britain’s Green Gym turned conservation work into a workout

In the United Kingdom, a conservation group called The Conservation Volunteers runs Green Gym, which offers outdoor workouts through local conservation and gardening work⁸. The first project began in Sonning Common, near Reading, about 1998⁸.

The group commissioned Oxford Brookes University to evaluate it, and the report came out in 2008⁸. Researchers surveyed 703 participants at 52 projects across the United Kingdom between 2003 and 2007⁸.

The findings were modest. Physical health scores rose slightly on average, and of the 66 people who started at or below the scale’s average, 55 scored higher at follow-up⁸. The average mental health score dipped, though people who started low were more likely to improve⁸. Weekly activity rose, but not by enough to rule out chance⁸.

The design had real weak spots. There was no comparison group, and only 194 of the 703 people, about 28%, returned the follow-up survey⁸. Nearly all were white⁸.

One detail stands out. Asked why they joined, participants ranked time outside and helping the environment highest and weight loss near the bottom⁸. People came for a purpose, and the exercise came along with it.

A garden workout plan, from warm-up to cool-down

Shape a garden session like a gym session. Use the 0-to-10 effort scale from the federal guidelines, where moderate feels like a 5 or 6 and vigorous starts around 7 or 8³.

A 45- to 60-minute session

1. Warm-up, 5 to 10 minutes. Walk the beds, gather tools, pick produce and do light watering (3.0 to 4.0 METs)¹. Effort: 3 to 4.
2. Heavy block, 10 to 20 minutes. Dig, turn compost, shovel soil or push a loaded wheelbarrow (4.8 to 7.3 METs)¹. Effort: 6 to 8. Switch sides and tasks often, and don’t stay in one position more than 10 minutes⁹.
3. Steady block, 15 to 25 minutes. Hoe, weed, rake or push-mow (3.8 to 5.5 METs)¹. Effort: 5 to 6.
4. Cool-down, 5 to 10 minutes. Plant, water or harvest, then stand, walk and stretch your legs and back¹⁹.

Pick your weekly level

Level	Sessions per week	Heavy block	Goal
Starting out	3 sessions of 20 to 30 minutes	Skip, or 5 minutes of light digging	Build a habit; 60 to 90 moderate minutes
Regular gardener	4 sessions of 30 to 45 minutes	10 to 15 minutes, 2 days a week	About 150 moderate minutes
Strong and experienced	4 or 5 sessions of 45 to 60 minutes	15 to 20 minutes, 2 or 3 days a week	150 to 300 minutes, with heavy days as strength work

This plan applies the federal guidelines to garden tasks. It hasn’t been tested as a program. On heavy days, the work should tire your legs, back and arms to count toward strength³.

Spare your back and knees: an ergonomics checklist

A garden asks your body to bend, twist, kneel and lift, often all at once. Cooperative extension services, the university outreach programs that advise farmers and home gardeners, offer advice that adds up to a simple checklist.

Heat. Our community gardens article covers CDC’s basics for gardening in hot weather. Two warnings are worth adding. Confusion, slurred speech, passing out or seizures in the heat can signal heat stroke, so call 911 and cool the person fast¹³.

After an unusually hard day of digging, dark, cola-colored urine with muscle pain or weakness can mean rhabdomyolysis, a breakdown of muscle tissue that needs immediate care¹³. A wide-brimmed hat and shade breaks help on sunny days.

Raised beds and adapted tools keep gardeners gardening

Gardening adapts well to age, arthritis and disability. That’s part of why it’s used in horticultural therapy. Drawing on the American Horticultural Therapy Association, Virginia Cooperative Extension reserves that term for gardening led by a trained professional, with a plan of care and measurable goals¹¹. Therapeutic gardening is the broader, everyday version, with no therapist required¹¹.

Practical measurements from two university programs:

Need	Recommendation
Gardening from a chair	Soil level 24 to 36 inches high12
Wheelchair with knees under the bed	Soil level about 34 inches, with up to 12 inches of soil and 24 inches of knee space12
Elevated bed on legs, for seated access	About 30 inches to the bed’s bottom, at least 8 inches deep11
Bed width	2 feet if you reach from one side, 4 feet from both11
Paths	At least 40 inches for a wheelchair, with wider spots that allow a 5-foot turning radius12
Water	A spigot 2 to 3 feet off the ground with lever handles11

Adapted tools help, too: foam grip sleeves, D-grip handles, ratcheting pruners, lightweight carts, and easy-rise kneelers or knee pads¹¹. The National Center on Health, Physical Activity and Disability, which publishes the seated-bed guidance, is a CDC-funded center at the University of Alabama at Birmingham¹².

What the evidence shows, claim by claim

Claim	Rating	What the research shows
Many gardening tasks are moderate or vigorous activity	Strong evidence	Measured energy costs in the 2024 Compendium1
Regular moderate activity lowers chronic disease risk	Strong evidence	Based on research on physical activity in general3
Regular gardening can supply a week’s moderate activity	Promising but early	Many tasks rate as moderate; one observational study of 14 older gardeners found they got there15
Gardening programs improve endurance and function in older adults	Promising but early	Two small, nonrandomized studies of older Korean women67
Gardening programs build measurable strength	Not enough evidence	Heavy gardening counts as strength work by federal definition, but grip, chair-stand and arm-curl scores didn’t change in the one program tested36
Gardening lowers blood pressure	Not enough evidence	One 21-person pilot without random assignment7
Green Gym improves health	Not enough evidence	Small, mixed gains in a survey with no comparison group and 28% follow-up8

One caution applies to all gardening research. People who garden for years may already be healthier, more mobile and better off than people who don’t. Studies that compare gardeners with non-gardeners can’t separate the garden from the gardener.

Still, gardening fits what many natural-health readers value: movement with a purpose, time outdoors and food you grew. Exercise that feeds you and doesn’t feel like a chore is exercise you’re likely to keep doing.

Questions readers ask

The bottom line

Gardening is real exercise when you put your back into it, sometimes literally. Weeding, hoeing and shoveling are moderate work, and hard digging is vigorous. The federal guidelines even count heavy gardening as strength work.

The research on gardeners is small and early, so don’t expect miracles. Shape your sessions with a warm-up, a heavy block and a cool-down, protect your back with good lifting habits and the right tools, and plan something else for winter.

Related reading

• Home gardens save money until you count your hours, but a trial found other payoffs
• Community gardens passed a rare scientific test, so test the soil too
• Your heart counts the weekly total while your habits count the repeats
• Wellness advice is written for an average person who doesn’t exist
• Hiking can double a walk’s workout, and the way down needs a plan too

Sources

1. Herrmann SD, Willis EA, Ainsworth BE, et al. “2024 Adult Compendium of Physical Activities: A Third Update of the Energy Costs of Human Activities.” Journal of Sport and Health Science, 2024; values from the Compendium’s “Lawn & Garden” activity list. pacompendium.com
2. Compendium of Physical Activities. “Older Adult Compendium.” 2024. pacompendium.com
3. U.S. Department of Health and Human Services. “Physical Activity Guidelines for Americans, 2nd Edition.” HHS, 2018. odphp.health.gov
4. Office of Disease Prevention and Health Promotion. “HHS Seeks Public Comments on Step Counts and Muscle-Strengthening Physical Activity.” HHS, October 9, 2026. odphp.health.gov
5. Park SA, Shoemaker C, Haub M. “Can Older Gardeners Meet the Physical Activity Recommendation Through Gardening?” HortTechnology, 2008. garden.konkuk.ac.kr
6. Park SA, Lee AY, Son KC, Lee WL, Kim DS. “Gardening Intervention for Physical and Psychological Health Benefits in Elderly Women at Community Centers.” HortTechnology, 2016. garden.konkuk.ac.kr
7. Park SA, Lee AY, Park HG, et al. “Gardening Intervention as a Low- to Moderate-Intensity Physical Activity for Improving Blood Lipid Profiles, Blood Pressure, Inflammation, and Oxidative Stress in Women Over the Age of 70: A Pilot Study.” HortScience, 2017. garden.konkuk.ac.kr
8. Yerrell P. “National Evaluation of TCV’s Green Gym.” School of Health and Social Care, Oxford Brookes University, 2008. tcv.org.uk
9. Howell E. “Healthy Tips to Garden With Fewer Aches and Pains.” Penn State Extension, updated 2025. extension.psu.edu
10. Geist L. “Consider Ergonomics When Buying Garden Tools.” University of Missouri Extension. extension.missouri.edu
11. Turner P. “Therapeutic Gardening” (SPES-432). Virginia Cooperative Extension, 2022. ext.vt.edu
12. National Center on Health, Physical Activity and Disability. “Getting Started With Accessible Gardening.” NCHPAD, University of Alabama at Birmingham, 2019, updated 2026. nchpad.org
13. National Institute for Occupational Safety and Health. “Heat-related Illnesses.” CDC, 2026. cdc.gov
14. Riebe D, Franklin BA, Thompson PD, et al. “Updating ACSM’s Recommendations for Exercise Preparticipation Health Screening.” Medicine and Science in Sports and Exercise, 2015 (abstract, University of Rhode Island repository; screening flowchart in ACSM roundtable slides hosted by the University of the West Indies, uwi.edu). digitalcommons.uri.edu
15. Leeds Beckett University, Carnegie School of Sport. “Physiology Group Screening Process” (health screening guidance based on ACSM), version July 2020. Www.Leedsbeckett.Ac.Uk